Portland, OR Weather & Growing Conditions
Tonight
42°F
Mostly Clear then Patchy Fog
Patchy fog after 2am. Mostly clear, with a low around 42. East southeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Mostly Clear then Patchy Fog | 1 mph ESE | 4% |
| Wednesday | 57°F | Patchy Fog then Chance Light Rain | 2 mph S | 53% |
| Wednesday Night | 49°F | Light Rain | 2 to 6 mph S | 93% |
| Thursday | 58°F | Slight Chance Light Rain then Partly Sunny | 0 to 3 mph SSW | 20% |
| Thursday Night | 48°F | Mostly Cloudy then Chance Light Rain | 2 mph SE | 54% |
| Friday | 58°F | Chance Light Rain | 3 mph SSE | 54% |
| Friday Night | 49°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph SSE | 20% |
| Saturday | 62°F | Patchy Fog then Slight Chance Light Rain | 2 mph SSE | 15% |
| Saturday Night | 51°F | Light Rain Likely | 1 to 13 mph S | 68% |
| Sunday | 59°F | Light Rain Likely | 1 to 12 mph SSW | 68% |
| Sunday Night | 48°F | Patchy Fog | 2 mph NE | 20% |
| Monday | 58°F | Chance Light Rain | 2 mph SE | 45% |
| Monday Night | 49°F | Chance Light Rain | 5 mph SSE | 51% |
| Tuesday | 60°F | Chance Light Rain | 1 to 5 mph S | 54% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, OR
Last spring frost
Feb 25
First fall frost
Dec 1
Growing season
280 days
Hardiness zone
8b
Explore more for Portland, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Portland Kgw-Tv, Or (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.